CEC: Add implementation of WAKEUP option to default HdmiCec

When WAKEUP is set to false, HAL does not wake up the system
upon receiving <Image View On> or <Text View On> messages.

Bug: 185434120
Test: manual
Change-Id: Iaf98020decc887f04b02da480adc70b76189b66d
diff --git a/tv/cec/1.0/default/HdmiCecDefault.h b/tv/cec/1.0/default/HdmiCecDefault.h
index c3682f7..c1bb2c7 100644
--- a/tv/cec/1.0/default/HdmiCecDefault.h
+++ b/tv/cec/1.0/default/HdmiCecDefault.h
@@ -48,6 +48,8 @@
     Return<Result> init();
     Return<void> release();
     static void* event_thread(void*);
+    static int getOpcode(struct cec_msg message);
+    static bool isWakeupMessage(struct cec_msg message);
 };
 
 }  // namespace implementation